Showing results: 226 - 227 of 227 items found.
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IBEKO Power AB
Transformer turns ratio testers from TRT series are DV Power instruments mainly designed for the measurement of power transformer turns ratio. Also, they measure transformer excitation current and phase shift. Special tests, such as automatic vector group detection and magnetic balance, can be performed on three-phase transformers and three-phase autotransformers.All models, except TRT03 series, have a built-in true three-phase power source, which is necessary for testing turns ratio of transformers with special configurations, such as phase-shifting, rectifier, arc-furnace, traction transformers, etc.DV Power turns ratio testers can output various test voltages for different applications. From the extremely low test voltage of 1 V AC that enables turns ratio verification of the majority of current transformers, up to the highest test voltage of 500 V AC that provides the most accurate turns ratio testing of power transformers used in power generation and transmission. By using the external booster, test voltage increases up to 5 kV AC in order to successfully test capacitive voltage transformers.All DV Power turns ratio testers have a built-in tap changer control unit. Because of that, it is possible to control the on-load tap changer (OLTC) directly from the device. In order to make the most out of this feature, the instrument and included DV-Win software can be programmed to do everything automatically – running turns ratio tests, changing OLTC tap positions, and saving results. This option significantly facilitates and shortens the turns ratio testing time.TRT turns ratio testers use the same set of cables as three-phase winding ohmmeter & tap changer analyzers from the TWA series. Consequently, it enables one-time cable setup for performing eight tests:turns ratioexcitation currentphase anglemagnetic balancevector group detectionwinding resistanceon-load tap changer DVtestand demagnetization.
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RNT-5A -
Neutronics Manufacturing Co.
This is a portable testing kit in one unit, suitable for testing protective relay, over current relay, earth fault relay, protective device, circuit breaker, tripping coils etc.The set is designed for both laboratory and field use. TECHNICAL FEATURES: INPUT : 230 Volts, single phase, 50Hz. AC. OUTPUTS : : 1) Current Output: a) 0- 1Amp. At 6/60Volts. (Continuous duty). b) 0- 5 Amps. At 6/60 Volts. (Continuous duty). c) 0- 10 Amps. At 6/60 Volts. (Continuous duty). d) 0- 20 Amps. At 6 Volts. (for30 min. duty). e) 0- 50 Amps. At 6Volts. (For 10 min. duty). f) 0-100 Amps. At 6 volts. (For10 min. duty). g) 0-200 Amps at 6Volts. (For 30 sec. duty). Current output is continuously variable and the output is taken out through a multi range C.T. The secondary is connected to an ammeter scaled in 0 to 100%. Output current range 1Amp. To 20Amps. Are selected by current range selector switch with common output terminals and for other three ranges three brass terminals are provided of proper ratting. 2) AC Voltage Output: Continuously variable 0 -230V AC. Capacity- 240VA (Max). OR DC Voltage Output: Continuously Variable 0-240V DC. Capacity-240VA.(max). One change over switch should be provided for selection of Volt. Meter for AC or DC voltage output & either AC or Dc voltage should be available at a time. 3) Time Measurement: 0-9.999Secs. & 0-99.99Secs. in two ranges. Accuracy: 1% CURRENT CIRCUIT: Loading transformer: Double winding loading transformer of suitable burden to provided corresponding current output specified before. One change over switch in current ckt. To be provided for voltage selection i.e. selection of 10volt. Or 50volt. Measuring CT: Multi ratio wound primary current transformer Ratio : 1-5-10-20-50-100-200A/5A. Variable auto transformer: For smooth variation of current output at various ranges selected. Tripping circuit: The current output will be cutoff incase of any overload for the range 200A or even if the relay under test actuated.
